Steel sucker rod is a kind of long slender bar used in pumping well, common standard is API SPEC 11B (Specification for sucker rods, polished rods and liners, couplings, sinker bars, polished rod clamps, stuffing boxes, and pumping tees). It connects with polished bar above, and pumps at the bottom. The function is to transmit the power.
Steel sucker rods length generally at 7.6 or 8 meters long, material usually use high-carbon steel and surface plating with hard chrome, in the tubing connected one by one until the piston at the oil layer to pump oil with up-and-down movement.
Steel sucker rod scope
The standard API 11B for sucker rod defines the specifications for size, mechanical properties, inspection and test methods. Covers products general sucker rod, fiber-strengthen plastic sucker rod, coupling, reducing coupling, polished coupling, polished bar and sinker bar.
The classification of steel sucker rod
Ordinary sucker rod covers: Grade C, D, K, KD sucker rod.
High-strength sucker rods covers: Grade H sucker rod, include three types: HY, HL, KHL.
Special sucker rods: Hollow sucker rod, steel rod.
Consecutive sucker rods: Steel rod.
Screw pump used special sucker Rod: Taper thread sucker rod, plugging-type sucker rod.
Fiberglass reinforced plastic (FRP) sucker rod: Fiber plastic sucker rod.
Flexible sucker rod: Carbon fiber compatible material sucker rod, wire rope sucker rod.
Other sucker rod: Electric sucker rod.
Grades and types
Grade C: Covers steel rod used in light-to-medium load and noncorrosive or anti-corrosive oil well. Manufactured in AISI 1530 Mod steel.
Grade K: Covers steel rod used in corrosive light-to-medium load oil well. Manufactured in AISI 4621 Mod steel.
Carbon steel Grade D: Covers steel rod used in noncorrosive or anti corrosive medium-to-heavy load oil well. Manufactured in AISI 1530 Mod low-alloy steel.
Alloy steel Grade D: Covers steel rod used in noncorrosive or anti corrosive medium-to-heavy load oil well. Manufactured in AISI 4142 Mod.
Grade KD sucker rod: Covers sucker rod which both have anti-corrosion properties of grade K, and mechanical properties of grade D. Manufactured in AISI 4320 Mod steel.
Grade D special sucker rod: Covers steel rod which used in medium-to-heavy anti corrosive oil well. Manufactured in 4330 Mod steel.
Grade H sucker rod: Covers steel rod which used in heavy-to-overweight load oil well.
Type HL sucker rod: Covers steel rod which by selecting appropriate material and process achieve grade H.
Type HY sucker rod: Covers steel rod which through quenching process to make the mechanical properties achieve grade H.
Grade and Mechanical Properties of the sucker rod
|
No. |
Grade |
Tensile Strength Rel (Mpa) |
Yield Strength Rm (Mpa) |
Percentage Elongation A(%) |
Contraction Percentage Of Area Z (%) |
|
1 |
C |
620-795 |
≥415 |
≥13 |
≥50 |
|
2 |
K |
620-795 |
≥415 |
≥13 |
≥60 |
|
3 |
D |
795-965 |
≥590 |
≥10 |
≥50 |
|
4 |
KD |
795-965 |
≥590 |
≥10 |
≥50 |
|
5 |
HL |
965-1195 |
≥795 |
≥10 |
≥45 |
|
6 |
HY |
965-1195 |
-- |
-- |
-- |
As a professional manufacturer of oil and gas downhole drilling tools, the sucker rods produced by Vigor are produced in strict accordance with API 11B standards. If required, Vigor can also provide you with sucker rods designed and manufactured to NORRIS standards. Sucker rods from Vigor have been used in major oil fields around the world, and customers have expressed high recognition of the quality of the sucker rods provided by Vigor and Vigor's conscientious and responsible attitude. If you are interested in Vigor's downhole drilling and completion tools, please do not hesitate to get in touch with us to get the most professional technical support and the best quality products.
